This is the PJT Series 23x8 Carbon Fiber Propeller from Xoar International.

FEATURES

Constructed of Laminated Epoxy resin over a carbon fiber
skeleton and finished with Standard 3K Carbon Fiber Fabric.
One of the lightest performance props on the market
Balanced during every stage of production
Visually examined to ensure trailing edge symmetry
High Strength-to-Weight Ratio